package com.tanhua.dubbo.api;

import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.Comment;
import com.tanhua.model.mongo.Movement;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.FindAndModifyOptions;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;

import java.util.List;

@DubboService
public class CommentApiImpl implements CommentApi{

    @Autowired
    private MongoTemplate mongoTemplate;

    // 发布评论, 获取评论数量
    public Integer save(Comment comment) {
        // 1. 查询动态
        Movement movement = mongoTemplate.findById(comment.getPublishId(), Movement.class);

        // 2. 向Comment对象设置被评论人属性
        if(movement != null) {
            comment.setPublishUserId(movement.getUserId());
        }

        // 3. 保存到数据库
        mongoTemplate.save(comment);

        // 4. 更新动态表中的对应字段
        Query query = Query.query(Criteria.where("id").is(comment.getPublishId()));
        Update update = new Update();
        if(comment.getCommentType() == CommentType.LIKE.getType()) { // 点赞
            update.inc("likeCount", 1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) { // 评论
            update.inc("commentCount", 1);
        } else { // 喜欢
            update.inc("loveCount", 1);
        }
        // 设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        options.returnNew(true); // 获取更新后的最新数据
        Movement modify = mongoTemplate.findAndModify(query, update, options, Movement.class);

        // 5. 获取最新的评论数量, 并返回
        return modify.statisCount(comment.getCommentType());
    }

    // 分页查询评论列表
    public List<Comment> findComments(String movementId, CommentType commentType, Integer page, Integer pagesize) {
        // 1. 构造查询条件
        Query query = Query.query(Criteria.where("publishId").is(new ObjectId(movementId))
                .and("commentType").is(commentType.getType()))
                .skip(( page - 1) * pagesize)
                .limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));

        // 2. 查询并发挥
        return mongoTemplate.find(query, Comment.class);
    }

    // 判断comment数据是否存在
    public Boolean hasComment(String movementId, Long userId, CommentType commentType) {
        Criteria criteria = Criteria.where("userId").is(userId)
                .and("publishId").is(new ObjectId(movementId))
                .and("commentType").is(commentType.getType());
        Query query = Query.query(criteria);
        return mongoTemplate.exists(query, Comment.class); // 判断数据是否存在
    }

    // 删除comment数据
    public Integer delete(Comment comment) {
        // 1. 删除comment表数据
        Criteria criteria = Criteria.where("userId").is(comment.getUserId())
                .and("publishId").is(comment.getPublishId())
                .and("commentType").is(comment.getCommentType());
        Query query = Query.query(criteria);
        mongoTemplate.remove(query, Comment.class);

        // 2. 修改动态表中的总数量
        Query movementQuery = Query.query(Criteria.where("id").is(comment.getPublishId()));
        Update update = new Update();
        if(comment.getCommentType() == CommentType.LIKE.getType()) { // 点赞
            update.inc("likeCount", -1);
        } else if (comment.getCommentType() == CommentType.COMMENT.getType()) { // 评论
            update.inc("commentCount", -1);
        } else { // 喜欢
            update.inc("loveCount", -1);
        }

        // 3. 设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        options.returnNew(true); // 获取更新后的最新数据
        Movement modify = mongoTemplate.findAndModify(movementQuery, update, options, Movement.class);

        // 4. 获取最新的评论数量, 并返回
        return modify.statisCount(comment.getCommentType());
    }
}
